Read The Forum Rules; used commonly in a forum to advise somebody (usually a new member) to not break the rules or post stuff in the wrong place. Also can be Read The Fucking Rules if you're in a bad mood.

I did not know there were Rules for Fucking. Where can I purchase a copy? Are they online? I checked Urban Dictionary and this is the only spot I can find a mention. RTFR obviously stands for Reinforce the Farmer's Revolt

Every housewife throughout Great Britain and Ireland should RTFR. The supermarkets are gaining the upper hand very rapidly, prices are out of control. The poor old hardworking farmers are working for a pittance. The farmer gets a very poor return for his efforts and the multinationals grow wealthier by the minute. Housewives, and you too guys because many of you earn the bread to pay for the housekeeping, RFTR.